var banner = new Array();

banner[0]='https://i.servimg.com/u/f88/13/68/61/52/tmc-ba11.jpg';
banner[1]='https://i.servimg.com/u/f86/14/46/26/57/fow_ba11.jpg';
banner[2]='https://i.servimg.com/u/f86/14/46/26/57/baniar11.jpg';


document.getElementById('i_logo').src= banner[Math.floor(Math.random()*banner.length)];